Now showing items 1-20 of 148

    • 134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce) 

      Sazinas, Rokas; Sakaguchi, Isao; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2017)
      Cation diffusion in functional oxide materials is of fundamental interest, particularly in relation to interdiffusion of cations in thin film heterostructures and chemical stability of materials in high temperature ...
    • 1D oxide nanostructures from chemical solutions 

      Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2014)
      Nanotechnology has motivated a tremendous effort to grow free standing or hierarchical nanomaterials such as nanowires and nanorods. Bottom-up approaches based on chemistry are an important approach to nanomaterials, and ...
    • 96Zr Tracer Diffusion in AZro3 (A = Ca, Sr, Ba) 

      Sazinas, Rokas; Sakaguchi, Isao; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2018)
      Cation tracer diffusion in polycrystalline AZrO3 (A = Ca, Sr, Ba) perovskites was studied at 1300–1500 °C in air using the stable isotope 96Zr. Thin films of 96ZrO2 were deposited on polished ceramic pellets by drop casting ...
    • A Finite-Size Study on Samarium-Substituted Bismuth Ferrite: Multiferroic and Lead-Free Piezoelectric Materials 

      Haneberg, Dag Håkon (Master thesis, 2011)
      Multiferroic materials combine two or more ferroic orders such as ferroelectricity, ferromagnetism and ferroelasticity. They have a great interest for the development of the next generations of digital electronic memory ...
    • A New Nano Insulation Material for Applications in Zero Emission Buildings 

      Schlanbusch, Reidun Dahl (Master thesis, 2013)
      New materials with extremely low thermal conductivities are interesting because they can have architectonic, technical and possibly economic benefits in buildings. A new nano insulation material (NIM) is under development ...
    • A van der Waals Density Functional Study of MoO3 and Its Oxygen Vacancies 

      Inzani, Katherine; Grande, Tor; Vullum-Bruer, Fride; Selbach, Sverre Magnus (Journal article; Peer reviewed, 2016)
      The electronic structure of layered molybdenum trioxide MoO3 is highly sensitive to changes in oxygen stoichiometry as Mo6+ has an empty 4d shell. Applications of MoO3 are responsive to small changes in vacancy concentration, ...
    • All-oxide thermoelectric module with in situ formed non-rectifying complex p-p-n junction and transverse thermoelectric effect 

      Kanas, Nikola; Bittner, Michael; Desissa, Temesgen Debelo; Singh, Sathya Prakash; Norby, Truls Eivind; Feldhoff, Armin; Grande, Tor; Wiik, Kjell; Einarsrud, Mari-Ann (Journal article; Peer reviewed, 2018)
      All-oxide thermoelectric modules for energy harvesting are attractive due to high temperature stability, low cost, and the potential to use non-scarce and non-toxic elements. Thermoelectric modules are mostly fabricated ...
    • Anelastic properties of La0.6Sr0.4Co1−yFeyO3-δ at high temperatures 

      Kimura, Y; Tolchard, Julian R; Einarsrud, Mari-Ann; Grande, Tor; Amezawa, K; Fukuhara, M; Hashimoto, Shin-ichi; Kawada, Tatsuya (Journal article; Peer reviewed, 2014)
      The dynamic amplitude dependence of the Young's modulus and the internal friction of La0.6Sr0.4Co0.2Fe0.8O3 −δ (LSCF6428) at high temperatures were evaluated by resonance measurements. At the temperatures from room temperature ...
    • Aqueous tape casting and mechanical properties of La2NiO4 dense membranes 

      Chen, Xinzhi; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2015)
      An environmentally friendly aqueous tape casting process for the fabrication of La2NiO4+δ membranes was developed using fine powders synthesized by spray pyrolysis. Green tapes with a thickness of 30–300 μm were obtained ...
    • Aspects related to the thermal and mechanical stability of oxygen permeable membranes 

      Sahini, Mtabazi Geofrey (Doctoral theses at NTNU;2017:59, Doctoral thesis, 2017)
      Fossil fuels causes CO2 emission to the atmosphere after combustion, and to minimize CO2 emission carbon capture and sequestration (CCS) technologies are under development. CCS involves CO2 capture, compression, transport ...
    • Assessment of the Thermodynamic Stability of Thermal Insulating Materials in Aluminium Electrolysis Cells 

      Luneng, Raymond; Grande, Tor; Ratvik, Arne Petter (Conference object, 2016)
      The cathode bottom lining in aluminium electrolysis cells serves as a thermal insulating barrier and is important for the overall thermal and dimensional stability of the cell. The thermal insulation layer ...
    • Atmosphere controlled conductivity and Maxwell-Wagner relaxation in Bi0.5K0.5TiO3 – BiFeO3 ceramics 

      Morozov, Maxim; Einarsrud, Mari-Ann; Grande, Tor (Journal article; Peer reviewed, 2014)
      Here, we report on a giant dielectric relaxation in (1 x)Bi0.5K0.5TiO3—xBiFeO3 ceramics below 300 C, which becomes more pronounced with increasing BiFeO3 content. The relaxation was shown to be of Maxwell-Wagner type ...
    • Autopsy of refractory lining in anode kilns with open and closed design 

      Brandvik, Trond; Wang, Zhaohui; Ratvik, Arne Petter; Grande, Tor (Journal article, 2018)
      Aluminosilicate refractory lining constitutes a major part of anode baking kilns, and during anode baking the lining is exposed to harsh conditions which limits the lifetime. Here, autopsies of refractory linings from both ...
    • B-cation ordering and dielectric properties of relaxor ferroelectric Pb(Sc1/2Nb1/2)O3 

      Baazi, Jonas Said (Master thesis, 2013)
      Molten salt synthesis and solid state synthesis were used to make relaxor ferroelectric Pb(Sc1/2Nb1/2)O3,abbreviated PSN in most literature. Many studies have previously been conducted on this material to obtain so called ...
    • Biaxial strength and slow crack growth in porous alumina with silica sintering aid 

      Bakken, Astrid; Wagner, Susanne; Hoffmann, Michael; Einarsrud, Mari-Ann; Grande, Tor; Thorstensen, Bernt (Journal article, 2018)
      Biaxial strength, fracture toughness and subcritical crack growth are reported for coarse grained porous alumina ceramics. The materials were prepared with a varying amount of a silica sintering aid, which resulted in the ...
    • C-TiB2 Composite Inert Cathode Material by Spark Plasma Sintering 

      Håberg, Audun (Master thesis, 2018)
      TiB2 has been considered a potential inert, wettable cathode material for aluminum reduction cells for a long time. An important characteristic of TiB2 as a cathode material, is its excellent wetting properties towards ...
    • Carbon cathode wear in aluminium electrolysis cells 

      Senanu, Samuel; Wang, Zhaohui; Ratvik, Arne Petter; Grande, Tor (Journal article; Peer reviewed, 2019)
      Autopsies of six spent potlinings with different carbon cathode block grades, amperage regimes and cell technologies were conducted at three separate smelters to reveal possible mechanisms causing cathode wear. Microstructure ...
    • Carbon Cathode Wear in Aluminium Electrolysis Cells 

      Senanu, Samuel; Wang, Zhaohui; Ratvik, Arne Petter; Grande, Tor (Peer reviewed; Journal article, 2019)
      Autopsies of six spent potlinings with different carbon cathode block grades, amperage regimes and cell designs were conducted at three separate smelters to reveal possible mechanisms causing cathode wear. The microstructure ...
    • Cathode Wear Based on Autopsy of a Shutdown Aluminium Electrolysis Cell 

      Senanu, Samuel; Schøning, Christian; Rørvik, Stein; Wang, Zhaohui; Ratvik, Arne Petter; Grande, Tor (Journal article; Peer reviewed, 2016)
      To investigate cathode wear, an autopsy of a shutdown aluminium electrolysis cell was conducted. The original lining consisted of a fully impregnated and graphitized carbon block and the cell was shut down after 2461 days ...
    • Cathode Wear in Aluminium Electrolysis Cells 

      Senanu, Samuel (Doctoral theses at NTNU;2019:317, Doctoral thesis, 2019)
      The increasing global demand for aluminium has resulted in growing production of aluminium metal through increased production capacity and improvement of the electrolysis technology. This has caused a development towards ...